MC34261 MC33261

3

MOTOROLA ANALOG IC DEVICE DATA

temperature range that applies [Note 3], unless otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

CURRENT SENSE COMPARATOR

Input Bias Current (VPin 4 = 0 V)

IIB

–

–0.5

–2.0

µA

Input Offset Voltage (VPin 2 = 1.1 V, VPin 3 = 0 V)

VIO

–

3.5

15

mV

Delay to Output

tPHL (in/out)

–

200

400

ns

DRIVE OUTPUT

Output Voltage (VCC = 12 V)

Low State

(ISink = 20 mA)

Low State

(ISink = 200 mA)

High State

(ISource = 20 mA)

High State

(ISource = 200 mA)

VOL

VOH

–

1.8

9.8

7.8

0.3

2.4

10.3

8.3

0.8

3.3

–

8.8

V

Output Voltage (VCC = 30 V)

High State (ISource = 20 mA, CL = 15 pF)

VO(max)

14

16

18

V

Output Voltage Rise Time (CL = 1.0 nF)

tr

–

50

120

ns

Output Voltage Fall Time (CL = 1.0 nF)

tf

–

50

120

ns

Output Voltage with UVLO Activated (VCC = 7.0 V, ISink = 1.0 mA)

VOH(UVLO)

–

0.2

0.8

V

RESTART TIMER

Restart Time Delay

tDLY

150

400

–

µs

UNDERVOLTAGE LOCKOUT

Startup Threshold (VCC Increasing)

Vth

9.2

10.0

10.8

V

Minimum Operating Voltage After Turn–On (VCC Decreasing)

VShutdown

7.0

8.0

9.0

V

Hysteresis

VH

1.75

2.0

2.5

V

TOTAL DEVICE

Power Supply Current

Startup (VCC = 7.0 V)

Operating

Dynamic Operating (50 kHz, CL = 1.0 nF)

ICC

–

–

–

0.3

7.1

9.0

0.5

12

20

mA

Power Supply Zener Voltage

VZ

30

36

–

V

NOTES: 1. Maximum package power dissipation limits must be observed.

Thigh = +70°C for MC34261

Pin 4 Threshold Voltage

VPin 3(VPin 2 – VFB)

2. K =

1.0

1.5

VM, MULTIPLIER INPUT VOLTAGE (V)

–0.5

4.0

Figure 1. Current Sense Input Threshold

versus Multiplier Input

Figure 2. Current Sense Input Threshold

versus Multiplier Input

–0.12

VM, MULTIPLIER INPUT VOLTAGE (V)

–0.08

0

0.04

0.08

0.12

0

0.5

2.0

2.5

3.0

3.5

–0.04

0

3.0

–0.5

0.16

–0.02

2.5

2.0

1.5

1.0

0.5

0

0.14

0.12

0.10

0.08

0.06

0.04

0.02

See Figure 2